On Tue, Aug 22, 2017 at 05:51:00PM +0900, Byungchul Park wrote: > On Tue, Aug 22, 2017 at 09:52:38AM +0200, Peter Zijlstra wrote: > > That wouldn't work. That annotation is to help find deadlocks like: > > > > > > mutex_lock(&A) > > <work> > > mutex_lock(&A) > > > > flush_work(&work) > > > > I meant: > > mutex_lock(&A) > <work> > lockdep_map_acquire_read(&work) > mutex_lock(&A) > > lockdep_map_acquire(&work) > flush_work(&work) > > I mean it can still be detected with a read acquisition in work. > Am I wrong?
Think so, although there's something weird with read locks that I keep forgetting. But I'm not sure it'll actually solve the problem. But I can try I suppose.
